Pressure-pump.



n. HUFF.. PESSURE PUMP. APPLICATION FYLED )UNE2B, 19H.

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UNITED STATES PATENT OFFICE.

RUSSELL HUF?, F DETROIT, MICHIGAN, ASSIGNOB. T0 PACKARD MOTOR CAB.CODANY, OP DETBIT, MICHIGAN, A CORPORATION 0F MICHIGAN.

PRESSURE-PUIG.

Speccation of Letters Patent.

Patented Nov. 16, 1915.

Original application led September 2. 1909, Serial Ho. 515,885. Dividedand this application tiled June 28. 1911. Serial lo. $5,881.

Toallwkomitmoy conce-rn:

Be it known that I, Rossem. HUH', a citizen of the United States. andresident of Detroit. Wayne county. State of Michigan, have inventedcertain new and useful Irnprovements 'rn Mure-Pumps, of which thefollowing is a specification.

This application is a division of my application, Serial No. 515,885,filed September 2, 1909.

This invention relates to pressure pumps and more particularly to anautomatic calnoperated, air compreing pump for use in prsure systems.This pump .ls especially adapted for use in connection with the gasolenetank of a motor vehicle, to which it suppliespmreanditissonstructedastobe driven by the cam shaft of the motor of said motor vehicle The objectof this invention is to provide an elicient., automatically operated pmepump, mounted upon the crank ease of a hyn or other motor, in anaccessible position and adapted to be driven by the cam shaft of themotor which is Within the crank case.

It is also the object to provide aconstructionofsuchacharacterthatalloftheparets may be easily laced inposition or remov without disturbing the cam sluit or any of the otherparts of the motor, and in which the of [Disassembly of the parts ispractically eliminated In the drawings: Figure 1 is a vertical sectionof the pump taken on the line 1-1 of Fig. 3; Fig, 2 is a view of thepump partly in elevation taken on the line :2--2 of Fig. 3; and Fig. 3is si plan view of the pump.

Referring to the drawings; 25 reprents a part of the motor crank caseupon which the pump is mounted.

is the cam shaft of the motor edly mounted upon it the eccentric cam Therod Q8 provided with the eccentric strap l5 cut away as shown at 46, 46,imparts motion from the cam 27 to the piston 34. This cut away portionis of suicient size so that the eccentric strap 45 can be removed fromthe shaft by moving the. saine endvvise until it clears the eccentric2T. and then moving the same vertically- The connecting rod 28 isconnected to the piston 34 by the usual wrist-pin 47 held in place bythe spring band 48.

The cylinder in which the piston 34 works 1s externally threaded and isclosed by a cylinder head 35 which is provided with an internal threadengaging the thread on the cylinder.

A lock nut 35 is provided for locking the head in place.

The cylinder head is provided with a transverse paage 36 which may beformed therein in any suitable manner, preferably by boring the same,the hole being closed by a plug 36. .An4 outlet passage 37 intersectsthe passage 36 and connects with the pipe line 23 in any suitablemanner, preferably by the ordinary union joint, as shown. Aspring-controlled check valve 38 controls the connection between thepaage 36 and the cylinder- A relief valve casing 39 is screwed into thecylinder head and is provided with a relief valve 40 controlled by a.spring il, the tension of the spring being controlled by an adjustingscrew 42. A pipe 42 connects the cavity above the relief valve with thecrank case `25. The cylinder is provided on its interior surface with agroove 43 which throws the crank case into communication with the upperpart of the cylinder when the piston is in its lowest position, thecommunication however being cnt ol when the piston pwes the end of thegroove, as shown-in Fig. 2. The base 30 is provided with downwardlyextending portions forming guid -i-Lor the connecting rod 28. The base30 forms one of the Acylinder heads.

It will be seen that the pump is of such a construction thatthe partsmay be easily azsembled. The Guides 44 are in offset relation to theaxis o the cylinder and so guide theconnecting rod that the pump is notaffected by giving to the cam shaft 26 the usual axial movement for thepurpose of relieving compression in the cylinders of the motor'inStarting. In hydrocarbon motors it is desirable to reduce the distancebetween the cam and crank shafts to a minimum in order to have the gearswhich drive the cam shaft of small size. and as a result there is verylittle space in which to operate the pump eccentric and the eccentricstrap thereon. In order to prevent the eccentric strap from interferingwith the connecting rods or cranks of the motor and also .to permit thepump t0 be removed Wit-houtA disturbing the. cam shaft 26 the eccentricstrap is cut. away between the points 46, 46, this cut-away portion, aswill 'De seen from Fig. 1, being slightly offsetrelative to the axis ofthe pump cylinder. 0n account of the minimum clearance between the partsof the motor and the pump it is absolutely essential that the eccentricStrap be placed in its proper position on the eccentric becauseotherwise the motor cranks would interfere with the eccentric strap whenthe motor was started- In order, therefore, to eliminate all liabilityof misaembly of the parts the guid -14 are arranged in offset relationto the axis of the cylinder and the portion '28 of the connecting rodwhich coperates withthegujdesisalsooisetsothatitwill be impossible toassemble the with the eccentric strap in other than its correct positionon the eccentric 27.

The entire pump may be disassembled and disconnected from the valveshaft in the following manner: The bolts extendinghtheearsareremovedandthe cylinder 32 is removed from the piston by anendwise and upward movement` The pinoli is now removed from theconnecting raibyremovngthebandandthe Wrist pin 47- The hase 30 is nowremoved from the connecting rod, and the connectingrodismovedtotheleftuntilthestrap' clears the eccentric 27, and thenmoved up wardly, the opening formed in the strap 45 clrngtheshaft.Thevalveshaft must be moved to the position shown in Fig.Qinorderthatthestrapmayclearthe eccentricl. Inordertoinsnrethatthepartsandmaybecorrectlyposiiioned eachofidpartsisprovidedwiththree ears31and33,respectively,andtheerank case is provided with three tapped holesfor receiving the hols extending through the ears.

The operation of the device is as follows: When the piston 34 descends,air is drawn into the upper part of the cylinderthegrooveandupontheretnrnofthe pistithisairiscomprcssedastobe forced outthrough the valve 38 into the palage 36 and then upward and outof thepipe'. Incasetoomnchpremeis evolved the excess may escape thr the reliefvalve i0 and pipe 42 back into the crank case.

1. In a pump, the combination with a easing, of a cylinder carried bythe casing, a piston workingY in the cylinder, an operting shaft mountedin the casing. an eccentric on said shaft, and a connecting rod providedwith an eccentric strap formed integral therewith and cut-away to clearthe shaft, whereby the cylinder, piston and connecting rod may beremoved from the casing withoutdisturbing said shaft.

In a pump, the combination with a cylinder, of a piston working therein,actuating means, a connecting rod having loose and separable connectionwith said means, and a cylinder head provided with guides for theconnecting rod and detachably connected to the cylinder.

3. In a pump, the combination with a cylinder, of a piston workingtherein actuating means, a connecting rod having loose and separableconnection with saidv means, a onepiece cylinder head provided with gnidfor the connecting rod and detachably connected to the cylinder, and adetachable connection between the piston and connecting rod.

4. In a pump, the combination with a cylinder, of a piston workingtherein, an operating shaft, an eccentric thereon, a. connecting rodprovided with an eccentric map cnc` away to clear the shaft, a one-piececylinder head provided with guides for the connecting rod and detachablyconnected to the cylinder, and a detachable connection between thepiston and connecting rod.

5. In a pump, the combinaon with a casing and a shaft mounted therein,of an eccentric on said shaft, a cylinder mounted on said casing, apiston for said cylinder, a connecting rod, and a guide for theconnecting rod having an opening 'therein ose't rom the axis of thecylinder, said connect ing rod having a portion thereof adapted to bearranged in said opening, whereby the guide and connecting rod can beassembled in but one relative arrangement..

6. In a pump, the combination with a casing having a cylinder mountedthereon, of a piston working in slid cylinder, a head for said cylinderprovided with a paage, an outlet connected to the passage, a connectonbetween the cylinder and the pesage, a check valve in mid connection, arelief valve for the paage., a pipe connedzngt-he relief valve with theinterior of the caslng,

and said cylinder having a passage extending longitudinally thereof andadapted to connect the interior of the cylinder with the interior of the0.

7. In a' pump, the co ination with a cylinder, of a piston workingtherein, a connecting rod, and a cylinder had detachably connected tothe cylinder and provided with guides for the connecting rod arranged inoisetrelation to the axis of the cylinder, for the purpose described.

8. In a pump, the combination with a cylinder, of a piston workingtherein, a connecting rod, a cylinder head detachably connected to thecylinder and provided with guides for the connecting rod a in offsetrelation to the axis of the cylinder,

'and a detachable connection between the piston and connecting rod.

9. In a pump, the combination with a cylinder, of a piston workingtherein, an operating shaft, an eccentric on said shaft, a connectingrod provided with an eccentric trap having a cutaway portion adapted topermit the strap to be removed from said shaft laterally, a cylinderhead detachably Copiesdthispatentmaybeobtainedtorvecentseachby connectedwith the cylinder, and a detach- 13 able connection between the pistonand connecting rod.

In testimony whereof I aix my signature in the presen of two witnesses.

RUSSELL HUFF. Witnx'fei F .1

mom., r., F. A. SMITH.

addressing the Commissioner of Patents,

washington, n. c.

It is hereby certified that in Letters Patent No. 1,160,411, gruntedNovember 16, 1915, upon the application of Russell Huff, of Detroit,Michigan, for an improvement in Pressure-Pumps, an error appears in theprinted specification reqniring correction as follows: Page 3, line 7,claim 9, for the word "trap" read strap; and

that the said Letters Patent should be read with this correction thereinthat the seme may conform to the record of the euse in the Patent OfEce.

Signed and sealed this 14th day of December, A. D., 1915.

R. F. VYHITEHEAD,

Acting Commissioner of Patents.

[SEAL] Cl. 23o-27.

